Question

Aside from their periods, short- and long-period comets differ because short-period comets Choose one: A. contain less ice, while long-period comets contain more. B. do not develop ion tails, while long-period comets do. C. mostly orbit prograde, while long-period comets have either prograde or retrograde orbits. D. come closer to the Sun at closest approach than long-period comets do.

Answer 1

C

Step-by-step explanation:

Short- and long-period comets differ because short-period comets mostly orbit pro grade, while long-period comets have either pro grade or retrograde orbits.

Pro grade refers object that spins in same direction as its orbit, whereas retrograde refers to an object that spins opposite to the direction of its orbit.